hw8_solution

hw8_solution - EE321 Spring 08 HW8 Problem 33 Buck...

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EE321 Spring 08 HW8 Problem 33 Buck Converter Operation Consider a machine with the following parameters: r a 0.1 := k v 0.2 := The machine is fed using a buck converter with the following parameters v fsw 2.4 := v fd 2.0 := v dc 150 := d 0.7 := The machine is operating at a speed of 300 rad/s. Compute the armature current, the average switch current, the motor efficiency, the converter efficiency, and teh overall efficiency First lets find the operating point ω r 450 := v a v dc v fsw () d 1d v fd + := v a 102.72 = i a v a k v ω r r a := i a 127.2 = Aveage armature current i s di a := i s 89.04 = Average switch Current
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T e k v i a := T e 25.44 = Average Torque i d i a i s := Average Diode Current i d 38.16 = P inarmature v a i a := P inarmature 1.307 10 4 × = P inconv v dc i s := P inconv 1.336 10 4 × = P out k v i a ⋅ω r := P out 1.145 10 4 × = η motor P out P inarmature := η motor 0.876 = η conv P inarmature P inconv := η conv 0.978 = η system P out P inconv := η system 0.857 = Average transistor loss P tran i s v fsw :=
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This note was uploaded on 09/22/2011 for the course ECE 321 taught by Professor Staff during the Spring '08 term at Purdue.

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hw8_solution - EE321 Spring 08 HW8 Problem 33 Buck...

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